Oh, very pretty stems? Am I seeing a NerD pcb?  
How does the switch feel though? Sounds/feels like a lighter MX Blacks? 
Thanks! Yeah, that's the NerD PCB.  The switches feel very nice. I lubricated them with Krytox GPL 105 in addition to swapping the springs with Korean 55g.
They are incredibly silent although it doesn't seem like it in the video because I was really pounding on them. Since the Cherry MX Silent switches
have rubber dampening built into the stem, it actually makes for a softer landing as well - which is much appreciated for me since I usually type hard. 
It honestly reminds me quite a bit of Topre except their is no tactile bump. I have another NerD PCB for this KMAC that I built using 55g lubricated 
Gateron Blacks and that is quite a bit louder. As compared to standard MX blacks, these are quite a bit lighter though.